About this Study Set
This study set covers Computer Science through
20 practice questions.
A collection of factual questions covering programming, hardware, and networking concepts. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 20 questions from the
Computer Science Essentials study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which data structure follows the 'Last In, First Out' (LIFO) principle?
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A
Queue
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B
Stack
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C
Array
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D
Linked List
2
In binary code, what is the decimal equivalent of the number 1011?
3
Which layer of the OSI model is primarily responsible for IP addressing and routing?
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A
Physical
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B
Data Link
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C
Network
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D
Transport
4
What does the acronym 'HTML' stand for in web development?
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A
HyperText Markup Language
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B
High-Level Text Machine Language
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C
Hyperlink Technical Markup Language
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D
Home Tool Markup Language
5
Which of the following is considered a low-level programming language?
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A
Python
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B
Java
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C
Assembly
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D
JavaScript
6
What is the primary function of an Operating System's kernel?
-
A
Managing user interface graphics
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B
Connecting to external printers
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C
Managing hardware resources and process communication
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D
Compiling source code into machine language
7
Which sorting algorithm has an average time complexity of O(n log n)?
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A
Bubble Sort
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B
Insertion Sort
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C
Quick Sort
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D
Selection Sort
8
In computer networking, what does a 'Ping' command measure?
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A
Download speed
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B
Packet latency or round-trip time
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C
The physical distance to the server
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D
CPU temperature
9
Which variable type is used to store true or false values?
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A
Integer
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B
String
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C
Boolean
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D
Float
10
What is the smallest unit of data in a computer, representing either a 0 or a 1?
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A
Byte
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B
Bit
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C
Nibble
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D
Word
11
Which company developed the Python programming language?
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A
Microsoft
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B
Google
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C
Guido van Rossum
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D
Oracle
12
What is the purpose of an SQL 'JOIN' clause?
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A
To delete a database table
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B
To combine rows from two or more tables based on a related column
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C
To update data in a row
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D
To sort the results of a query
13
Which type of memory is volatile and loses its data when the power is turned off?
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A
ROM
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B
RAM
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C
Hard Disk Drive
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D
Flash Memory
14
What is the base of the Hexadecimal numbering system?
15
Which character signifies a comment in Python code?
16
What is the main role of a compiler?
-
A
To execute code line by line
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B
To convert source code into machine code
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C
To manage memory allocation
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D
To debug logic errors
17
Which logic gate returns true only if both inputs are true?
18
What does the 'Big O' notation describe in computer science?
-
A
The amount of memory used by a computer
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B
The efficiency and performance of an algorithm
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C
The number of lines of code in a program
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D
The storage capacity of a hard drive
19
Which protocol is primarily used for securely transferring files over the internet?
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A
HTTP
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B
FTP
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C
SFTP
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D
SMTP
20
What is the primary function of a CPU's ALU?
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A
Control memory access
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B
Perform arithmetic and logical operations
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C
Manage graphical output
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D
Communicate with input devices
